I run my SRT on track days (20 minute heats) and the hotter the car gets the slower it goes. It still goes pretty good however. My coolant temps hit 225º. Unfortunately I never logged the IAT's until after I changed my H/E and don't know what they normally run on a high speed track. In the 1/4 mile they reach 160º. At the autox they reached 142º or around there. My logs show the hotter the IAT's the less timing the computer allows. So, find a way to keep the IAT's cooler and you'll go faster.

Les